– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 pm Tue 29 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Tue 29 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryHeavy rain (total 26mm), heaviest during Tue afternoon. Very mild (max 14°C on Wed afternoon, min 8°C on Tue night). Wind will be generally light. | Days 5–7 Weather SummaryMostly dry. Warm (max 22°C on Sun afternoon, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||
Tue 29 | Wednesday 30 | Thursday 1 | Friday 2 | Saturday 3 | Sunday 4 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  |  |  | |  | | | | | | | |
heavy rain | rain shwrs | clear | clear | some clouds | cloudy | light rain | light rain | rain shwrs | rain shwrs | clear | clear | clear | clear | clear | clear | clear | |
Cloud base (m) | 550 | 5100 | 9150 | 5550 | 2950 | 1850 | 750 | 650 | 850 | 8600 | 9600 | 9450 | |||||
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 20 | 0.1 | — | — | — | — | 1.7 | 4 | 1 | 0.2 | — | — | — | — | — | — | — |
max °C | 12 | 10 | 12 | 14 | 11 | 14 | 11 | 11 | 13 | 15 | 13 | 18 | 20 | 16 | 21 | 22 | 17 |
min °C | 12 | 8 | 8 | 13 | 10 | 11 | 11 | 11 | 12 | 15 | 12 | 13 | 20 | 16 | 16 | 21 | 15 |
chill °C | 12 | 8 | 8 | 13 | 10 | 11 | 11 | 11 | 12 | 15 | 12 | 13 | 20 | 16 | 16 | 21 | 15 |
Freezing level m | 2600 | 2450 | 2550 | 2800 | 2800 | 2850 | 3150 | 3050 | 2900 | 3100 | 3600 | 3800 | 3900 | 4050 | 4050 | 3950 | 3750 |
 | — | — | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — | 7:09 | — | — | 7:11 | — | — |
 | 6:51 | — | — | 6:49 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:40 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Heavy rain (total 26mm), heaviest during Tue afternoon. Very mild (max 14°C on Wed afternoon, min 8°C on Tue night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Warm (max 22°C on Sun afternoon, min 12°C on Fri night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
SHIP8084 | |||||
 | |||||
Bellingham Airport |  | ||||
SHIP8554 | |||||
SHIP7145 | |||||
SHIP9944 | |||||
SHIP9955 | |||||
SHIP8080 |
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.